diff options
Diffstat (limited to 'arch/arm/mach-pxa/pm.c')
| -rw-r--r-- | arch/arm/mach-pxa/pm.c | 169 |
1 files changed, 44 insertions, 125 deletions
diff --git a/arch/arm/mach-pxa/pm.c b/arch/arm/mach-pxa/pm.c index e66dbc26add..b59a81a8e7d 100644 --- a/arch/arm/mach-pxa/pm.c +++ b/arch/arm/mach-pxa/pm.c @@ -24,61 +24,13 @@ #include <asm/arch/lubbock.h> #include <asm/mach/time.h> - -/* - * Debug macros - */ -#undef DEBUG - -#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x -#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x] - -#define RESTORE_GPLEVEL(n) do { \ - GPSR##n = sleep_save[SLEEP_SAVE_GPLR##n]; \ - GPCR##n = ~sleep_save[SLEEP_SAVE_GPLR##n]; \ -} while (0) - -/* - * List of global PXA peripheral registers to preserve. - * More ones like CP and general purpose register values are preserved - * with the stack pointer in sleep.S. - */ -enum { SLEEP_SAVE_START = 0, - - SLEEP_SAVE_GPLR0, SLEEP_SAVE_GPLR1, SLEEP_SAVE_GPLR2, SLEEP_SAVE_GPLR3, - SLEEP_SAVE_GPDR0, SLEEP_SAVE_GPDR1, SLEEP_SAVE_GPDR2, SLEEP_SAVE_GPDR3, - SLEEP_SAVE_GRER0, SLEEP_SAVE_GRER1, SLEEP_SAVE_GRER2, SLEEP_SAVE_GRER3, - SLEEP_SAVE_GFER0, SLEEP_SAVE_GFER1, SLEEP_SAVE_GFER2, SLEEP_SAVE_GFER3, - SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3, - - SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U, - SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U, - SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U, - SLEEP_SAVE_GAFR3_L, SLEEP_SAVE_GAFR3_U, - - SLEEP_SAVE_PSTR, - - SLEEP_SAVE_ICMR, - SLEEP_SAVE_CKEN, - -#ifdef CONFIG_PXA27x - SLEEP_SAVE_MDREFR, - SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER, - SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR, -#endif - - SLEEP_SAVE_CKSUM, - - SLEEP_SAVE_SIZE -}; - +struct pxa_cpu_pm_fns *pxa_cpu_pm_fns; +static unsigned long *sleep_save; int pxa_pm_enter(suspend_state_t state) { - unsigned long sleep_save[SLEEP_SAVE_SIZE]; - unsigned long checksum = 0; + unsigned long sleep_save_checksum = 0, checksum = 0; int i; - extern void pxa_cpu_pm_enter(suspend_state_t state); #ifdef CONFIG_IWMMXT /* force any iWMMXt context to ram **/ @@ -86,100 +38,35 @@ int pxa_pm_enter(suspend_state_t state) iwmmxt_task_disable(NULL); #endif - SAVE(GPLR0); SAVE(GPLR1); SAVE(GPLR2); - SAVE(GPDR0); SAVE(GPDR1); SAVE(GPDR2); - SAVE(GRER0); SAVE(GRER1); SAVE(GRER2); - SAVE(GFER0); SAVE(GFER1); SAVE(GFER2); - SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); - - SAVE(GAFR0_L); SAVE(GAFR0_U); - SAVE(GAFR1_L); SAVE(GAFR1_U); - SAVE(GAFR2_L); SAVE(GAFR2_U); - -#ifdef CONFIG_PXA27x - SAVE(MDREFR); - SAVE(GPLR3); SAVE(GPDR3); SAVE(GRER3); SAVE(GFER3); SAVE(PGSR3); - SAVE(GAFR3_L); SAVE(GAFR3_U); - SAVE(PWER); SAVE(PCFR); SAVE(PRER); - SAVE(PFER); SAVE(PKWR); -#endif - - SAVE(ICMR); - ICMR = 0; - - SAVE(CKEN); - SAVE(PSTR); - - /* Note: wake up source are set up in each machine specific files */ - - /* clear GPIO transition detect bits */ - GEDR0 = GEDR0; GEDR1 = GEDR1; GEDR2 = GEDR2; -#ifdef CONFIG_PXA27x - GEDR3 = GEDR3; -#endif + pxa_cpu_pm_fns->save(sleep_save); /* Clear sleep reset status */ RCSR = RCSR_SMR; /* before sleeping, calculate and save a checksum */ - for (i = 0; i < SLEEP_SAVE_SIZE - 1; i++) - checksum += sleep_save[i]; - sleep_save[SLEEP_SAVE_CKSUM] = checksum; + for (i = 0; i < pxa_cpu_pm_fns->save_size - 1; i++) + sleep_save_checksum += sleep_save[i]; /* *** go zzz *** */ - pxa_cpu_pm_enter(state); - + pxa_cpu_pm_fns->enter(state); cpu_init(); /* after sleeping, validate the checksum */ - checksum = 0; - for (i = 0; i < SLEEP_SAVE_SIZE - 1; i++) + for (i = 0; i < pxa_cpu_pm_fns->save_size - 1; i++) checksum += sleep_save[i]; /* if invalid, display message and wait for a hardware reset */ - if (checksum != sleep_save[SLEEP_SAVE_CKSUM]) { + if (checksum != sleep_save_checksum) { #ifdef CONFIG_ARCH_LUBBOCK LUB_HEXLED = 0xbadbadc5; #endif while (1) - pxa_cpu_pm_enter(state); + pxa_cpu_pm_fns->enter(state); } - /* ensure not to come back here if it wasn't intended */ - PSPR = 0; - - /* restore registers */ - RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1); RESTORE_GPLEVEL(2); - RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2); - RESTORE(GAFR0_L); RESTORE(GAFR0_U); - RESTORE(GAFR1_L); RESTORE(GAFR1_U); - RESTORE(GAFR2_L); RESTORE(GAFR2_U); - RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2); - RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2); - RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); - -#ifdef CONFIG_PXA27x - RESTORE(MDREFR); - RESTORE_GPLEVEL(3); RESTORE(GPDR3); - RESTORE(GAFR3_L); RESTORE(GAFR3_U); - RESTORE(GRER3); RESTORE(GFER3); RESTORE(PGSR3); - RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER); - RESTORE(PFER); RESTORE(PKWR); -#endif - - PSSR = PSSR_RDH | PSSR_PH; - - RESTORE(CKEN); - - ICLR = 0; - ICCR = 1; - RESTORE(ICMR); + pxa_cpu_pm_fns->restore(sleep_save); - RESTORE(PSTR); - -#ifdef DEBUG - printk(KERN_DEBUG "*** made it back from resume\n"); -#endif + pr_debug("*** made it back from resume\n"); return 0; } @@ -190,3 +77,35 @@ unsigned long sleep_phys_sp(void *sp) { return virt_to_phys(sp); } + +static int pxa_pm_valid(suspend_state_t state) +{ + if (pxa_cpu_pm_fns) + return pxa_cpu_pm_fns->valid(state); + + return -EINVAL; +} + +static struct pm_ops pxa_pm_ops = { + .valid = pxa_pm_valid, + .enter = pxa_pm_enter, +}; + +static int __init pxa_pm_init(void) +{ + if (!pxa_cpu_pm_fns) { + printk(KERN_ERR "no valid pxa_cpu_pm_fns defined\n"); + return -EINVAL; + } + + sleep_save = kmalloc(pxa_cpu_pm_fns->save_size, GFP_KERNEL); + if (!sleep_save) { + printk(KERN_ERR "failed to alloc memory for pm save\n"); + return -ENOMEM; + } + + pm_set_ops(&pxa_pm_ops); + return 0; +} + +device_initcall(pxa_pm_init); |